7. The dual principle derived from the antagonism of light and darkness.
It is noticeable that Ahura Mazda is considered as luminous and good, and Ahrimān as gloomy and bad. Ahura Mazda, according to Darmesteter, can be traced back to Asura, the supreme god of Indo-Iranian times, and is the representative of Varūna, Zeus or Jupiter, that is the sky or heavens. Similarly Ahura Mazda is described in the Zend-Avesta as righteous, brilliant, glorious, the originator of the spirit of nature, of the luminaries and of the self-shining brightness which is in the luminaries. Again he is the author of all that is bright and shining, good and useful in nature, while Ahrimān called into existence all that is dark and apparently noxious. Both are complementary as day and night, and though opposed to each other, are indispensable for the preservation of creation. The beneficent spirit appears in the blazing flame, the presence of the hurtful one is marked by the wood converted into charcoal. Ahura Mazda created the light of day and Ahrimān the darkness of night; the former awakens men to their duties and the latter lulls them to sleep. These features of the good and evil spirits seem to point to the conclusion that the original antithesis which is portrayed in the conflict between the principles of good and evil is that of night and day or darkness and light. The light of day and all that belongs to it is good, and the darkness of night and that which belongs to it evil. As already seen, Ahura Mazda is considered to be equivalent to Varūna or Zeus, that is the god of the sky or heavens. Originally it seems likely that this deity also comprised the sun, but afterwards the sun was specialised, so to speak, into a separate god, perhaps in consequence of a clearer recognition of his distinctive attributes and functions in nature. Thus in the Zoroastrian religion Mithra became the special sun-god, and may be compared with Vishnu and Surya in India and Apollo in Greece. In the Avesta the sun is addressed as the king.[14] Ahura Mazda speaks of the sun-deity Mithra as follows to Zoroaster: “I created Mithra, who rules over large fields, to be of the same rank and dignity as I myself am (for purposes of worship).” The only visible emblem of Ahura Mazda worshipped by the Pārsis is fire, and it would seem that the earthly fire, which is called Ahura Mazda’s son, is venerated as the offspring and representative of the heavenly fire or the sun. Thus Ahura Mazda may have been originally an old god of the heavens, and may have become the abstract spirit of light from whom the sun in turn was derived. If, as is now supposed, the original home of the Aryan race was somewhere in northern Europe, whence the Iranian and Indian branches migrated to the east, the religious tenets of the Pārsis may perhaps have arisen from the memory of this journey. Their veneration of fire would be more easily understood if it was based on the fact that they owed their lives to this element during their wanderings across the steppes of eastern Europe. The association of cold, darkness and snow with Ahrimān or the evil one supports this hypothesis. Similarly among the Indian Aryans the god of fire was one of the greatest Vedic gods, and fire was essential to the preservation of life in the cold hilly regions beyond the north-west of India. But in India itself fire is of far less importance and Agiri has fallen into the background in modern Hinduism, except for the domestic reverence of the hearth-fire. But Zoroastrianism has preserved the old form of its religion without change. The narrow bridge which spans the gulf leading to heaven and from which the wicked fall into hell, may have originally been suggested by the steep and narrow passes by which their ancestors must have crossed the mountain ranges lying on their long journey, and where, no doubt, large numbers had miserably perished; while their paradise, as already seen, was the comparatively warm and fertile country to which they had so hardly attained, where they had learnt to grow corn and where they wanted to stay thenceforth and for ever.